Landing nipple with subsurface safety valve

Details Landing nipple with subsurface safety valve Landing nipple with subsurface safety valve

1983-07-05

1985-06-25

Novosad, Stephen J.

Wells

Valves, closures or changeable restrictors

Fluid operated

166322, 166242, E21B 3410, E21B 4312

Patent

active

045248303

ABSTRACT:
A cooperating landing nipple and subsurface safety valve in which the closure springs for the subsurface safety valves are carried by the landing nipple and the actuator and the pressure responsive member for effecting opening and closing of the valve are carried by the subsurface safety valve.

REFERENCES:
patent: 3882935 (1975-05-01), Calhoun
patent: 4026362 (1977-05-01), Mott
patent: 4214606 (1980-07-01), Deaton et al.
patent: 4252197 (1981-02-01), Pringle
patent: 4294315 (1981-10-01), Yonker et al.
patent: 4422618 (1983-12-01), Lawson
patent: 4436152 (1984-03-01), Fisher, Jr. et al.
patent: 4441558 (1984-04-01), Welch et al.
Composite Catalog of Oil Field Equipment & Services, 1982-1983, p. 4591.

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